Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é o Método, quando o Oponente é "Chalid Arrab"?
 ###Tabelas: CREATE TABLE heirs_to_the_austrian_empire (heirs_to_the_austrian_empire_id AUTO_INCREMENT PRIMARY KEY, Emperor VARCHAR, Heir VARCHAR, Relationship to emperor and status VARCHAR, Became heir VARCHAR, Ceased to be heir VARCHAR, Next in line VARCHAR) CREATE TABLE mixed_martial_arts_record (mixed_martial_arts_record_id AUTO_INCREMENT PRIMARY KEY, Res. VARCHAR, Record VARCHAR, Opponent VARCHAR, Method VARCHAR, Event VARCHAR, Round INT, Location VARCHAR) CREATE TABLE names_and_attributes (names_and_attributes_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Direction VARCHAR, Mantra VARCHAR, Weapon VARCHAR, Consort VARCHAR, Graha (Planet) VARCHAR, Guardian Mātṛkā VARCHAR) CREATE TABLE alabama_counties_ranked_by_per_capita_income (alabama_counties_ranked_by_per_capita_income_id AUTO_INCREMENT PRIMARY KEY, County VARCHAR, Per capita income VARCHAR, Median household income 1,000,000 VARCHAR, Median family income VARCHAR, Population INT, Number of households INT) CREATE TABLE record_by_conference (record_by_conference_id AUTO_INCREMENT PRIMARY KEY, Conference VARCHAR, Bids INT, Record VARCHAR, Win % INT, Quarterfinals VARCHAR, Semifinals VARCHAR, Final VARCHAR, Champions VARCHAR)  
SELECT Method FROM mixed_martial_arts_record WHERE Opponent = chalid arrab